Question

Ross needs to buy a countertop for a laundry room. He calculated the area to be 12 square feet. The actual area is 11.8 square feet. What is Ross's percentage error?

1.02%
1.69%
20%
98%

Answer 1

%age error = difference in actual and calculated * 100
-----------------------------------
actual area

Answer 2

So its a @cwrw238

Answer 3

All we need to do is to find how many percent of 12 is 0.2 (why 0.2? because that's his error which can be counted by 12 - 11.8 = 0.2).

0.2 = x% of 12
0.2 = x/100 * 12
0.2 = 12x / 100 / * 100 (both sides)
20 = 12x / ÷ 12 (both sides)
x = 20/12
x = 5/3
x = 1 2/3
x = 1.66

Answer: Ross' percentage error was about 1.66%.

Answer 4

no try again

(12 - 11.8) * 100
--------------
11.8

Answer 5

Oooooooo Ok so its B

Answer 6

1.69 B

Answer 7

Correct?

Answer 8

yes

Answer 9

Faamous 5 was wrong- the percentage is based on the actual area which was 11.8 not 12